RU1808336C - Expendable syringe - Google Patents

Abstract

Usage: in medicine for injection. SUMMARY OF THE INVENTION: A piston with a rod is placed in the housing and longitudinal and helical grooves are connected to each other on the inner side wall, the latter of which are arranged to move into the first fingers. An inclined protrusion 8 is made in each longitudinal groove, and in each finger - a hole 11 of a triangular shape, the axis of which is perpendicular to the axis of the housing. 1 s.p. f-ly, 5 ill.

Description

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The disposable injection syringe Rus (syringe Rus) refers to a medical instrument, namely, the disposable injection syringe,

The purpose of the invention is to increase the guaranteed ™ disposable syringe.

Promote the guarantee of the operation of the syringe Rus made from the side of the open end of the chamfer and rounding, which ensures reliable penetration of the fingers into the longitudinal grooves.

In FIG. 1 shows a disposable injection syringe in FIG. 2 is a section AA of FIG. 1; in FIG. 3 is a section BB of FIG. 2; in FIG. A - scan of the inner surface of the housing with longitudinal and screw grooves; in FIG. 5 - node

1 of FIG. 3 on an enlarged scale.

Injection syringe Rus contains jorpus 1 in the form of a glass with a tip

2 for attaching the needle (not shown in phi g, 1) and with the openings made on the inner side wall of the cylinder from the side of the open end and connected with each other

3 and screw 4 grooves in the last of which are placed with the possibility of movement in the first fingers 5, connected to the rod 6 connected to the piston 7, in each longitudinal groove 3 an inclined protrusion 8 is made, the slope 9 of which is directed inside the housing-glass 1 to its axis, and the end surface 10 of the protrusion 8 is facing the tip 2, the finger used with a hole 11 of a triangular shape, the axis of the hole 11 is perpendicular to the axis of the housing-cup 1 edge 12 of the finger 5, facing the tip 2 is rounded on the rod 6 recesses 13 in which fingers 5 are placed, d on which is greater than the depth of the recess 13, and the diameter is less than the depth and height, the fingers 5 are connected to the stem 6 by stiffeners 14, the axis of which is perpendicular to the axis of the finger 5. On the open end of the housing-bezel. Chamfers 15 and rounding 16 are made, which contribute to fingers 5 in the longitudinal grooves 3, which additionally guarantees the correct operation of the syringe Rus.

Disposable injection syringe Russia works as follows.

Assembled as shown in FIG. 1 injection syringe Russia through a needle (not shown) mounted on the tip 2, collect the medicine under the piston 7 by moving the rod 6 in the direction of the open end of the cone-cup 1, while the fingers

5 sliding along the screw grooves 4, rotate the rod 6 in the direction of the longitudinal 3 grooves. As the medicine is collected, fingers 5 move from screw 4 to longitudinal

3 grooves. When air is released from under the piston zone (movement of the piston 7 in the direction of the tip 2), the fingers 5 move in the longitudinal grooves 3.

After all the air has come out

an injection is conducted from under the piston zone. To do this, the piston 7 is moved by the rod 6 in the direction of the tip 2. The fingers 5 moving along the longitudinal grooves 3 extend an inclined protrusion 8 of the bend 9, this is facilitated by the rounded edge 12 of the finger 5, while the hole 11 of the triangular shape is elastically flattened in the recess 13, in which fingers 5 are placed. After passing finger 5 of the protrusion 8,

the finger extends elastically and prevents the stem from moving from the tip 2 towards the open end. In this way, reuse of the syringe is avoided, since jamming of the rod relative to the cylinder occurs with fingers.

.Formula of the invention

Claims (2)

1. A single-use injection syringe comprising a housing in the form of cup with a tip for attaching the injection needle to its closed end and with a piston placed inside it with a rod and with disposable means, characterized in that, for the purpose of To increase the guarantee of one-time use, the one-time use means is made on the inner side wall of the glass and interconnected from the side of its open end, longitudinal and screw grooves, in the latter of which are placed with the possibility of movement into the first fingers connected to the rod, while in each longitudinal groove an inclined protrusion is made, the inclination of which is directed inside the glass to its axis and the end surface of which facing the tip, and each finger is made with a hole of a triangular shape, the axis of which is perpendicular to the axis of the glass and with a rounded edge facing the tip, with recesses made in the rod, in each of which a finger is placed, length otorrhea greater than the depth of the recess, and a diameter of less depth and height of the excavation. 2. The syringe according to claim 1, characterized in that the fingers are connected to the rod by means of stiffening ribs made on the latter perpendicular to the fingers.